交流恒电流电阻焊控制装置能正确控制电阻焊的主要参数,从而找出造成焊接不良的原因。并经有效值运算回路,在每半周终了时就可运算出它的有效值。该有效电流值与数码开关设定的电流值相比较,依靠电压相位移相回路与设定电流值相比,若焊接电流小那么下半周可控硅的触发角可相应地向前推进,反之可推迟计时信号的产生。该信号经脉冲触发回路放大后作为可控硅 AC constant current resistance welding control device can correctly control the main parameters of resistance welding, in order to find the cause of poor welding. And the effective value of the circuit, at the end of each half-week can be calculated out its effective value. The effective current value and the digital switch to set the current value compared to relying on the voltage phase shift phase and set the current value compared to the small welding current then the second half of the SCR trigger angle can be pushed forward accordingly and vice versa Can delay the timing signal generation. The signal amplified by the pulse trigger circuit as a SCR